Charging A Drill Battery Without An "Official" Charger

Just a quick video to show how us hobbyists can charge drill batteries with simple, inexpensive power supply boards. Also in this video is how a generic Chinesium charger works.
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[@stephenhadley2490]

You gave me an idea of charging a drill I found using a 12v RC car charger. Worked a charm.

[@gianttrance5180]

I had one of those black and decker electric screwdrivers, it lasted me 6 years of abuse. I was impressed

[@JohnDoe-ih5el]

Don’t know enough about electricity to charge my batteries this way. Screw that I’d rather just get the stupid charger. Really cool video though it’s crazy how much science I take for granted every day

[@lomgshorts3]

Coming from an Amateur Radio operator, your charging video is well considered. We use buck and boost chargers all the time for the various rechargeable batteries we use daily. Several charger designs use this method. So I can say to your detracters, Very Well Done !!!

[@videolabguy]

Great video! Thanks! When the battery reaches the same voltage as the power supply, the current will stop flowing. That is, current drops to zero amps. No voltage differential. You can prove this by turning your power supply up by about another tenth of a volt and current will start flowing again. As you mentioned, don't do this for too long to avoid battery damage or worse.

[@oz93666]

On the Makita pack you will see a yellow connector which connects to the standard Makita charger as well as the +ve and -ve terminals you used ... This way the voltage of each cell is monitored by the charger and kept within correct range ... If you were to charge by your method REPEADEDLY the cells will drift out of alignment and damage could result . Other companies appear to have this balancing circuit within each pack and not in the charger , so only have two terminals to connect to charger.

[@MrPir84free]

Many RC hobby stores sell balancers for batteries. it should not be overcomplicated to figure out how to hook it up and balance the batteries. Then and again, you should be able to check for an out of balance situation with a simple multimeter; just don't short out the connections.

[@andy07899986]

Spot on 👍

[@ededwards1787]

FYI - How to charge info Starts @ 8:00.

[@MrStringybark]

Thanks. I gave up scrolling through this guy's waffle-on about his life history with drills.

[@kdt85]

Thanks

[@SmokieTheOne]

Thanks.

[@Pulverrostmannen]

there is actually a bit more going on inside these batteries that is good to know, in most cases the packs have a built in BMS and balancing circuit hence the separate charge pin, there is a higher voltage on the charger to make sure the charging is complete and quicker and when the pack is near it´s full charge the balancing is done, if the cells are drifting in voltage it evens them out and if you charge these packs on the output pins you won´t get proper balancing and it can lead to damage but sure this is a bit different between brands and how it is made. some chargers and batteries has a whole bunch of pins and can be separate balancing or temperature monitoring whichever can be built into the battery or the charger itself. so in conclusion the best option is to use a real charger made for the battery or if you do it yourself figure out how the battery bms is made to work and use the correct charging input for it. usually the battery has built in over and under voltage protection, it gonna turn off if too much discharged and it should also cut charging if the voltage goes too high, however if you charge on these outputs it may not be able to shut down over charge or unbalanced cells causing a fire hazard or damage to your equipment. so basically if you are not 100% sure what you are doing then prefer a dedicated charger made for this battery :)

[@alexecheverria]

I don´t find any chargers for car o 12V power source. Seems like they want you to buy lots of batteries to go back home to charge them. But sometimes you will need to charge them from car or solar panel. Is there a way to do so with no risk of burning them?

[@Pulverrostmannen]

@@alexecheverria if you can’t find any option for a charger the best option would likely be to use a Buck-Boost unit with a constant current capability and they tend to be rather cheap to get. You can dial in the correct charging voltage and tune in the maximum charging current and you could charge your battery from pretty much any voltage you desire within the converters range. It is still hard to tell if charging your battery with another source can cause problems with it so make sure you take all safety precautions possible if doing so

[@alexecheverria]

@@Pulverrostmannen My poor english was not aware of "buck-boost" magic word and found a cheap one on Banggood with V and A display. Although it is not delivering more power output than imput I got a step up board to deliver 24v to it. Great advice, appreciate it!

[@Pulverrostmannen]

@@alexecheverria no problem at all. Good luck with your project :)

[@johnnymatthews44]

Can't get the effing chargers mate. That's why KZbin Duh.

[@SuperFarukpatel]

I got inspired by your video to boost my old drill batteries that haven't worked in years and i just got them working today! Thanks very much for your video!

[@dragan3290]

In Sydney my oldest brother used to buy MAKTEC! Identical to makita! Top job.

[@pheelix-]

All "well made" Lithium Drill batteries have a 4-6s BMS in them that balance charge each 18650. The 14-21v (depending on the pack) gets divided to each battery and charge at 4.2v. The BMS is also has overcharge and undercharge protection. If you open up the casing you can charge each 18650 using any charger that has balance leads as the batteries are connected in series. The last battery in this video. That should be a balance lead connecter (that yellow connector in the middle). Using that connector you can check each batteries voltage on its own.

[@SimpleElectronics]

Be careful when saying "all" of something, check this out: kzbin.info/www/bejne/eHbRiotuYqiZppI

[@pheelix-]

@@SimpleElectronics fixed it, the really really cheap stuff don't count :P But as I can see even the "High end brands" seem to be cheaping out on there components.

[@fraeharrubah6503]

Good work> You explained it slowly and informatively. But I got lost in the middle as I am a plug-n-play guy. The ease of use that comes with the Chinese charger would be my choice to get the job done without having to go through all the learning and buying of other products. Thanks

[@noneedtoknow6098]

First I will need a magic tutorial to understand this science.

[@ernestwalden3894]

I can't believe it that's amazing WOW. And I thaught I was the only one that had a hyper tough drill 😂😂😂

[@christophernalbone6299]

I use a bench power supply. You can set the voltage and current limit. My power supply supply is 0 to 50 volts dc and only 1.5 amp max. . I usually set the current between 650 ma to 1 amp. I have been charging li ion batteries for years this way. By the way my power supply is from the 1970's with an analog meter. Buy a cheap Chinese model power supply with at least 0-30 volts and 3 amp capacity. Well worth it. Thanks for the video, not bad.

[@smeeegheeeed1]

This has to be my favourite Video this year - Very well explained and presented - Great Job!

[@Laser3303]

I thought you were just gonna use another drill to turn the dead one backwards with a chucked bolt in the good one, pushing the trigger of the dead one to 'force-feedback' the dead battery. But you showed me how to waste time and be a cheapskate all-in-one! Oh Joy, oh Bliss!

[@jameswatters9592]

really informative and perfect timing as I've just bid and won a drill without charger. cheers

[@ljy82]

what a great video lesson on electroincs on "power tools batteries" It's like a refresher for me and when you get older its really nice to have this kind of video to watch. thank you sir for your great video. I really enjoyed it very much. aloha from kauai ;)

[@SimpleElectronics]

Thank you for the kind words!

[@frndssayaugust306]

You lost me at pre cut wood. That stuff don’t grow around here. 😆 Great vid thanx for the tip!

[@simonm1447]

an ''official'' Makita charger does something additional - it checks the temperature, and regulates the current in behalf of the cell temperature and the possible currents without damaging the cells - it don't charge the battery at all if it's too cold (around - 5 ° C) - it cools down the cells first before charging if they are too hot - it reduces the current if the SOC has reached 80 % My batteries from 2015 are still perfectly fine despite they have been used commercially on construction sites for more than 5 years, always charged in a original Makita charger

[@simonm1447]

@Uhavenoright toask an official charger is around 45 € in Europe, a 3rd party charger may save you 15 or 20 € at max. 20 € are not much over the lifespan of the device. With Makita you get typically a lot of bang for your bucks, especially compared to European brands or German brands. If your batteries die prematurely because the 3rd party charger stresses them more than the original one you don't save money at all. If you want it cheaper and you don't use the tools often you can still buy corded ones, they need no batteries and no charger and will work for decades

[@josephbookim8451]

@@simonm1447 you’re missing the point guy. Sure you can use the official charger everyone already knows and understands that. Just because you don’t understand how to balance charge batteries don’t assume and prevent others as well. your “official”charger or nothing attitude adds nothing to this video and it’s obvious you don’t understand the topic at hand enough to make such statements. So shhh 🤫

[@simonm1447]

@@josephbookim8451 Of course I know how to balance a Li-Ion battery pack, however no craftsman would invest hours of time to recharge tool batteries if he can simply put them into a charger which isn't even expensive which does all the work by itself (and charges even faster). My oldest LXT batteries are almost 7 years old now, used commercially the whole time. They still work fine even with much more powerful machinery which wasn't even on market when I bought these battery packs. Using self made chargers is surely a nice experiment and fine for people who want to learn something new, but no serious craftsman would do this at work

[@josephbookim8451]

@@simonm1447 1. nobody said they were a craftsman 2. Nobody said they were trying to do this at work so what are u going on about. Again the topics on hand seem to just be flying right over you and you’re going on about something nobody brought up lol

[@dean-543]

@@simonm1447 so battery chargers charge batteries..? Cool.

[@rayscrafield2106]

Thanks for your great explanation. I'm a novice at electronics and 78 years old so I have to go very slow and you made it very understandable.

[@RobertwJahrling]

LAYMAN'S TERMS BUDDY LAYMAN'S TERMS SPEED IT UP NOBODY WANTS TO HEAR A BUNCH OF DRIBBLE THEY JUST WANT TO KNOW HOW TO CHARGE THERE DAMN BATTERYS

[@d-s-ll2378]

E-tool or EV battery pack are build indide with multipile groups. Each group is charged independantly by way of floating charging and monitoring, to limit any group over charge and over heat. If any group is over charged, it could generate over heat, causing damage or fire.

[@mikemorgan5015]

Yay! I saved 30 dollars. I might burn my house down, but I saved 30 dollars? You electrically savvy folks out there know what you're doing. Some watching this DON'T. The line between fully charged and BOOM is pretty fine with Li-Ion cells. Not leaving them unattended only means you get to witness the explosion first hand. My time, body, and property are worth more than that. Just my 2 cents.

[@SimpleElectronics]

fair point, but I have a tear down of this battery coming, it isn't as dangerous as you think, (but still should never be unattended)

[@LiquidSSSnake]

I've been using my RC car battery charger. It has settings for every type of battery (even lead acid) and an alligator clip attachment. I stick paper clips in the battery then attach the charger.

[@impactajuvenile]

How much does an RC battery charger costs?

[@LiquidSSSnake]

@@impactajuvenile The B6 chinese knockoffs start at $25 usd... Might be ok for power tools. I got a name brand one because I use it more and to be safe with "dangerous" RC lipos.

[@edwardfitz-gibbon6484]

Yea ok but just take a look at the Mikita battery. It has a yellow connector too for the BMS on the charger. Charging without the right charger will eventually kill the battery pack because one cell will eventually reverse charge.

[@SimpleElectronics]

Although this is best practice, it's not the end all be all. Many brands do not do any balancing at all, simply disallowing the charge entirely if one cell gets out of charge

[@sprayitdown50]

Just so you know that’s knockoff makita is an impact not a drill :-) (drills have chucks for drill bits). Thanks for the cool video !

[@robplant5576]

An Impact Driver

[@BoopShooBee]

I use an iCharger 208B as a charger. It will charge dang near anything. I even charge my 48 volt ebike battery by splitting my pack and charging in parallel and running in series using a 4 pole double throw switch....... It also allows lowering the charge voltage to prolong the life of the batteries and it displays Amp Hours used in charging so I can figure out AH per mile on my bike. edit: And other stuff as well such battery degradation..... It cost some bucks but I have used it a lot for over 6 years with no problems.

[@shawnzimmerman1547]

I put a 5s balance lead on 20v harbor freight pack and I use a 20 dollar rc charger to charge I use the balance charge function works like a charm and a lipo fire bag

[@johnnymatthews44]

Wow, ! thank you for simplifying this task. I live in Hawaii and no one ships lithium batteries. That is they won't fly them. So making due is neccessary. Im an electrician with plenty of motor controls under my belt. But thanks to you i don't need to do more research. I make things safely for safety.. so this will totally work. ❤ I've got a Ridgid 12 volts that are obsolete discontinued and no one will send me the charger or the battery how to have Milwaukee 12 volt . I know it's the same three cells if I can get the Milwaukee to charge the Ridgid I will make a video

[@allentuggle6732]

If the pink bothers you; walmart also sells paint.

[@scottfirman]

Lithium ion batterys can and will become unbalanced over time. All chargers are designed to balance the individual cells so they all charge evenly. My guess is there is a circuit board in with the battery that properly balances charge. If not, the charger its self does the job. Be careful when charging a battery unbalanced.

[@sdavrider]

Wrong. The knock off batteries such as this one have no balancing.

[@mohamedmotala4811]

If this is meant to be learned then, I would give a thumbs for it. I think you're giving a commentary rather than showing how it's done!

[@SimpleElectronics]

Well, what wasn't clear to you in the video?

[@mohamedmotala4811]

@@SimpleElectronics just go a little slower so that whatever you're saying can be understood. I found this video interesting but hard to follow. That's it.

[@mohamedmotala4811]

So will you be redoing this video?

[@SimpleElectronics]

There will be a follow-up eventually but not a total redo, no

[@mohamedmotala4811]

@@SimpleElectronics can you not maybe just this once repeat the main part again?

[@oilsmokejones3452]

I wouldn't be surprised at all if your battery(s) last 5 years charging @250ma..the touted high end 30 min and 1 hr chargers kill more cells than all other causes combined and trades people go through batteries like they were Skittles..ofcourse when shopping pros look for the best battery warranties so can just swap them in for new ones..BTW I have NiCd's that are decades old and still almost as good as new...they have never been fast charged or over charged..

[@pacman4568]

All of that went WHOOSH over my poor old head.

[@garyhager714]

Why is the lock picking lawyer doing tool videos?

[@THEOGGUNSHOW]

💅 🤡

[@lyfted100]

Hahahaha ON POINT THO! 👉🏻☠️☠️☠️

[@jcrnda]

I purchased a Chinese knock-off Makita battery with 15 Li-ion elements inside, 9.0 Ah. Heavy, I know. With a knock-off Makita charger it charges in a couple of hours. That's the point, you don't have all day to charge your batteries.

[@simonm1447]

Does it charge in a original Makita charger? They have up to 9 Amps charging current, 3rd party chargers often only 3 Amps.

[@SHADOW.GGG-]

watching this and looked out the window, tumbleweeds rolling past by the bucket load

[@jamesallen6007]

My window as well.

[@alwaysopen7970]

You should incorporate that circuitry into the existing charger housing rather than playing with clips and wires.

[@themaintenanceman1]

Yup so this is the last video I watched! I am way behind!!! Lol I’ll definitely be going through the tool haul videos! Keep up the great work!! 🤜🤛

[@rob58882]

Nearly fell asleep looking at this video

[@pleasecho2]

Drill cells are a different breed of 18650. They are made for high discharge. Don't use anything else if you want to duplicate a drill cell pack

[@E-hab]

Are the laptop batteries the same?

[@pleasecho2]

@@E-hab Those are a good example of low power storage cells. The ones in power tools are much more robust

[@SimpleElectronics]

Sometimes, but not always! Gotta be careful because sometimes they just parallel up the lower current cells to provide more current!

[@westinthewest]

I think this was true for Ni-Cd and NiMH cells, but aren't Most Li-ion cells ok for high discharge? There's a trade-off between cell capacity and internal resistance for sure, but cells sold for vaping are probably running harder than any power tool. You would probably be fine with those in your drill battery.

[@LibertyDIY]

This is true, huge difference in maximum discharge current between standard 18650 and high drain 18650

[@davidcoomber4050]

Wake me up when you get to the changing part

[@lorraine830]

Thanks for the hints and helpful advice, which btw, worked for me.

[@CNCmachiningisfun]

Hopefully, these battery packs have internal management systems, to ensure even charge distribution over the cells that make it up. If you are anything like me, you are allergic to the blast radius of angry battery packs.

[@SimpleElectronics]

You can find out in approx. 14 hours! I have a video coming out about that!

[@CNCmachiningisfun]

@@SimpleElectronics Kewl narnies :) . I have LOTSA batteries here, and I always watch them closely during charging, as the blast radius can be quite flammable!

[@eliphas_catdaddy7982]

All power tools are basically the same on the inside. The only difference is - manufacturers make control boards that are designed to identify and refuse 3rd party batteries. The only purpose of this is to let them make more money off you. The Chinese have gone a different way - all their power tools use interchangeable control boards, triggers and charging boards. This is also why a Makita trigger will cost 40+ dollars, while a trigger for a Chinese drill of similar quality will only cost 1-5$ max.

[@BillO964]

I smell a battery fire starting someplace.

[@cenewton3221]

I find some great deals on tools and gear like this at pawn shops. Have to look around a bit and find things that have been on hand, sitting, for a while and get marked down. Recently got a Dewalt drill/battery/charger for $12, works great. Nice video here, but I'm probably going to stick with chargers.

[@timway6839]

Good luck trying to charge 18 v battery from car or boat running 12v. This is why I kept my old 12v bosh/whatever. Old battery is in the landfill now so just plug in to the connectors and now hav a chord drill. Works fine.

[@craftymulligar]

I suppose thats what missing an thermo resistor to measure temperature to shut the whole project down when the battery gets too warm. Thats why they have very low current flow for those cheap charger setup. You could of mentioned that.

[@christinalodge7597]

"I've been playing with thing" and he's going to teach us about electricity?????? Hilarious!!! Shoot maybe he knows something we don't! Thnx for the video

[@zarathustra1430]

Thank you sir for the education

[@jedics1]

I always hated how the brands lock you in to their ecosystem when they are all offering the same thing just with different colours..Hopefully I will get around to doing this so I can just buy the best value tool at the time...

[@SimpleElectronics]

I will have a video soon on adapting batteries to different brands!

[@SimpleElectronics]

The video is now live! kzbin.info/www/bejne/eHbRiotuYqiZppI

[@snowflakemelter1172]

If your house burns down using a Makita charger on a Dewalt battery who you going to sue ?

[@bulla8631]

it’s a multi voltage in series connected it can be used just only 12volts

[@vulcano911]

Wow! indeed it is really complex for my tired brain

[@cavecreektrader]

Thank's for the charging info.

[@pileofstuff]

Next step: build a mating connector for the battery for easier connecting the charger.

[@SimpleElectronics]

Well, I do own a 3d printer...

[@GeorgeJFW]

see how he does with it lol

[@nickcavanaugh9586]

i just use the cheap chargers gut the circuit and straight lead mine to a hobby charger

[@djedUVprojector]

Good watch, but you should have shown the "full bars" led lights on the battery at the end. Was waiting expectantly.

[@caesarstatts]

Thank you so much your video helped out a lot I needed to find out what NTC meant and I found out in your video and stayed tuned for more informative things so i appreciate your video and all your help bless you dude peace

[@SimpleElectronics]

Thank you for the kind words!

[@chrisbritton8326]

The reason why you couldn't change the battery and the voltage would not increase is because of the resistance was too high. The amps must over come the resistance of the cells. When the battery gets older the more resistance it has and more amps it takes to charge it. If you were starting with low amps like you did in your video. I predicted the outcome before you gave up. But good video please make more.

[@uralbob1]

Very, very good! Thanks!

[@blowme5150]

Did you just say shitully?? Sweet

[@mattg7207]

Give a man a battery and he can drive a few screws. Teach him to build a battery charger and he can build a dock kit.

[@johnberkemeier3741]

best afforted in this plan so use this battery recovery ideas

[@timpeterson2738]

I bought 2 of those walmart drills on sale too, they have lasted longer than my Dewalts, bang for your buck.

[@bunboy5871]

"Ahhhhhh Shit" is exactly what I'm going to say when I burn down my house trying to do this. I'll just get a charger, thanks for your time.

[@stanleymeyer9936]

Look for "XL6009" on ebay about $5 will charge any battery, just adjust the output to 2 or 3 volts above the battery voltage when fully charged. So to charge a 20 volt battery, set the module to 23 or 24 volts and it will be a safe and cheap way to charge any battery or power supply for any low amp device such as small radio or DVD player or LED lamp or LED light bulb etc.

[@Ozzy3333333]

@@stanleymeyer9936 great way to start a fire, here is why, the bms in these packs have a balance circuit with less than 500mA, your suggested dc-dc module has 3A output current = OVERCHARGE when the cells are out of balance, its not rocket science.

[@TheFalseJared]

Thank you, i got a drill and the charger for the battery IMMEDITALLY stopped working

[@tcantrell5301]

When you gave the all s*** I subbed that's awesome

[@daddyrkingpin]

Wow how simple.and easy.

[@snowflakemelter1172]

You can only do this with cheap batteries without the protection circuits of the big brand tools. Get a imax RC charger and you can safely charge any of these " unlocked " batteries of any type any voltage.

[@tomperrah3965]

You fucking kidding me almost fell asleep bro

[@stevesfascinations1516]

Good explanation and video. Nice filming. Keep them coming!

[@opera5714]

Nice theory, but...... I tried that with my Ryobi and the BMS won't let any current in. I'll have to build something to take it.

[@thomasobrien2222]

You are great thank you so much for sharing your knowledge you have been teaching me so much thank you thank you

[@spockmcoyissmart961]

I buy good tools and good batteries, which is why I use the factory charger. If I was in an apocalypse situation, I'd consider other ways to charge. makita also has a 'charge counter' to know how many times it was charged for warranty reasons. If you battery appears to fail prematurely, my dealer plugs it into a makita gizmo they have and it says exactly how many times it was charged/date of manu. just sayin'.

[@NathanSMS26]

My own ridgid batteries overdischarged themselves so the factory charger thinks its defective, using the method from this vid I was able to get them up the few volts for the factory charger to work again

[@ssteele1812]

Why not just use the jumper wires from your testing of the charger and other pack to connect this pack to the other charger?

[@SimpleElectronics]

Because it was a demonstration, that's all!

[@davidreynolds4684]

Going to take this time to warn people about black and decker cordless tools. Most cordless tools are dc volt. Most have removeable batteries. Most also have a decal showing their required charging voltage and charge rate and if its ac or dc volt. I found that many black and decker cordless tools on the lower end pricewise dont have removeable batteries. They also tend to not display if its ac dc orceven the required voktage and charge rate. For some reason my attorney constantly removes the wall charger from the location of the tools and they mysteriously disappear. Rather than guess i took a drill apart to verify what its electrical requirments were. It was ac . After several times of playing this game i found more times than not black and decker cordless tools with nonremoveable batteries were ac volt. So dont go grabbing any old wall charger assuming its going to be ok just because the voltage is the same.

[@richardhaen]

Very good video, iI will have to try that thanks

[@JohnNy-ni9np]

Does the battery pack have cell balancer electronics embedded ???

[@SimpleElectronics]

I have a video going live on Tuesday about that very subject!

[@luisanderson4114]

Very interesting video. I understand the danger of fire when charging lithium ion batteries, but I don’t understand why you insist that the battery not be left alone to charge especially when you have a device that limits the charging current and shuts off when the maximum voltage is reached. If one must remain present while charging the battery that alone is not worth the effort. I might as well buy a charger that you don’t have to be present during the charging period.

[@SimpleElectronics]

Well even on an OEM charger, it isn't a good idea to leave lithium-ion batteries to charge unattended. Yes, millions of people across the globe do it, but it is a risk nonetheless. Most of these packs are not balance charged so if one cell refuses to hold a charge, the other cells are overcharged by 15-20% and could catch fire. In short, it is never a good idea, oem charger or not, but mainly, you kind-of have to expect the worse when you make videos for general consumption.

[@oneeyemonster3262]

@@SimpleElectronics . It just depends what brand and model...the more expensive packs has a built in balancing PCB inside the pack. Some brand's balancing PCB are in the charger... The cheaper 12v( 3s) or 5s 1500mah...dont have any balancing. It just depends. ..Most people dont use cordless drills often. A contractor...might need 8-10 packs...just to get through the day.lol The all dont have the same C ratings or 18650 brands, either.... Even if the outside marking has the same name brand. You'll have to open the packs... I try not to leave un attended...( it's not always possible.) Ive had Lipo blew up....just walking less than 5 mins away.. When 18650 leaks..the chemicals will leak from a bad cell.. then short out the wiring...melts the plastic or wires..ect I Charge OUT SIDE...I dont always put in a fire box like Im suppose too....even thou i have firebox for lithuim batteries. I have plenty of lituim catch on fire or starts smoking...while in use. Im into R/C...run over power brushless ....high AMP/drain esc...ect Contrary to what's on Paper...the MOTOR sometimes PULLS or sucks the juice out of the batteries,,Yes..the esc is suppose to limit it... but when electronic component gets hot...they dont always operate as they should.lol...Im more aware of these things..from using them.. and I also worked in electronics manufacturing...Most people dont.

[@luisanderson4114]

@@SimpleElectronics It's obvious from your video that you have a good understanding of the subject, much more than I do. I'll keep your advice tucked somewhere in my head, but all of my battery operated devices have lithium ion batteries. I charge them unattended, and in all the years I have never had one start a fire. I have had chargers that refuse to charge a battery due to the temperature of the battery being too high or a bad cell, but no more than that. Thanks for your advice.

[@dean-543]

Just set it up outside, then go take a nap.

[@pointedspider]

At 400ma, that'll take 13 hrs to charge!

[@sterman7632]

I mean if he bough a fake battery he might buy charger as well

[@1033141]

thank you sir

[@automajstorijediy]

will batery electronic stop the charging itself ?

[@billybobs841]

Good video I'm goin try that

[@LawnMowersThingsThatMakeNoise]

I lost the charger for my Dayplus impact wrench drill. it has 6000mah and 36f written on it ?

[@SimpleElectronics]

Check the voltage with a multimeter and you should be good to follow these instructions after that

[@AtTheBarn]

You know what your doing but I am not sure where the 4.11 volts came from. ALL 18650 or 18750 batteries I have used are marked for 3.7 v and test out to 3.7 to 3.9 v.

[@SimpleElectronics]

The older tech ones were (are) 4.1v - it depends on the chemistry

[@simonm1447]

Usually NCM is always made for end of charge voltage of 4,1 to 4,4 Volts. But there are also LFP cells, they have a different voltage characteristic and a end of charge voltage between 3,7 and 3,8 Volt. Cordless tools usually use NCM.

[@sheilauva4807]

Help. "Can I use a 12.5v charger on a 6v battery for a 6v craftsman 3/8" drill?

[@SimpleElectronics]

Definitely should not

[@tanksoldier9770]

Could you use an old train transformer to charge anything ?

[@SimpleElectronics]

With a bit of tinkering you could - you would have to rectify the AC into DC using at least a half-wave rectifier and a capacitor

[@francoisguyot9770]

We got to stop saying "Cheap Chinese stuffs...? Pretty much all cells, high and low quality, are made in China? Are Tesla or Dyson cells made in China? You bet they are! However, people never say cheap Chinese, referring to Apple's cells. Yet almost all Western consumer products bought in US or Western world use part or whole products made in China. Quality comes at a price, so blame yourself for the cheap stuffs you buy, as no one else forced you to. We should strive respecting others to gain their respect in return.

[@vcommandarv5916]

👏 👏 👏

[@francoisguyot9770]

@@vcommandarv5916 Cells quality if matched in their capacity, charge and discharge is actually quite good. Since they are manufactured from batches and automatically assembled. But there is a built in planned obsolescence designed into the proprietary BMS of the battery itself that pertains to the designers of the module. So Milwaukee, Bosh, Makita, DeWalt, Ryobi... batteries using similar cell's capacity, charge, discharge, temp... may fail sooner or later depending on the design of its BMS, which by far determines the overall quality and longevity, thus the price of the battery module itself.

[@manbunmyname5866]

12:30 💩🤣😎 Been there

[@alchemy1]

What if you let the battery decide how much current it draws? All one has to do is set the voltage on the power supply.

[@SimpleElectronics]

Then the battery could overheat, if you just let it go unregulated, it could pull a LOT of current

[@stanleymeyer9936]

Precisely! 😊

[@stanleymeyer9936]

You would let the battery decide as long as the charger's output amps are lower than the battery itself. For best deal on a charger, search ebay for XL6009 DC Booster for $3 and set the voltage 2 or 3 volts above the battery's designated voltage. So, for a Makita 18v battery, set the booster to 20v and let it charge for at least 4 hours. For a totally depleted battery, 8 hours or more. Touch the battery to make sure it isn't hot and check the battery for functionality. Otherwise, a good battery should just take as much amps as it needs and then slowly takes less charge as it gets full without overheating. Revive dead batteries this way, , Don't worry, it won't overcharge it. You can use the same module to maintain your car battery of you are letting the car sit for months. (set it to 15v for car battery for days. Set it to much higher voltage for an almost dead car battey until you can feel it starts to hold charge again. The booster just produces square wave pulses which batteries love to shake off that sulfation. But it also works well as an adapter for electronics such as a DC clock radio and as a charger for any lithium battery like cellphone if it has a removable battery

[@stanleymeyer9936]

@@SimpleElectronics if i understood this correctly, as long as the charger puts out less amps, it can't hurt the battery which has a lot more amps. The force of the battery sucking in the amps is as much as the module is willing to give. Abd after it has received enough amps, its appetite slows down until saturated. The PWM system keeps the battery from over consumption also, like little nibbles instead of a downpour.

[@alchemy1]

@@stanleymeyer9936 I typically set the amp on the charger, say at 500mA and the Volt at say 4.2, and let it go. As the battery charges and as it reaches the voltage threshold the current also goes down and after that, the current will gradually drop to 0 and it is done. The battery won't draw a thing if its tummy is full. Perhaps the concern is one does not want the battery to draw more than it can handle or needs. It won't if you limit the volts and the amps of course. Plus I think if you just supply the right voltage, you are good to go. If you have a shorted battery, that is a different ball game. In that case, it is a good idea to limit the amp just to be on the safe side. That sounds right to me. I took apart the battery pack of a laptop, Toshiba. There were 6 of them red batteries. Each of them was full of around 4.2 volts. I tell these critters are some serious batteries. One fine day one of them read 2 volts. I put it on that adjustable DC supply. 30V 10 A. I put the charger at 4.2 V and the current at 450mA. In no time that battery was charged, maybe an hour at most. That flashlight was bright and good and everything as winter cool to the touch.

[@timbarnett3898]

This is me, with no charger!

[@melvoquiros4388]

Hi my drills battery get charge but don't power the drill. How to fix that.

[@SimpleElectronics]

Probably a dead drill

[@AnttiHarri]

At 7:30 you say it must charge through the little lead, but at the end of the video where you start charging, you only connect the big leads?

[@jonnyg172]

Hate saying it but hyper tough rechargeable lights are great

[@rick8676]

Interesting video, a bit over my head. I'm looking to charge and 18v battery when I don't have an 18v charger. I have a 12v charger for a Milwaukee drill, a trickle charger for automotive use, and a bigger car charger. What wire goes where?

[@SimpleElectronics]

None of those options will work unfortunately

[@donaldscott7279]

Probably me but this is to complicated to me

[@SimpleElectronics]

sorry, I tried!

[@VTWINWILLY]

It was made overly complicated. Simple Electronics must have some Electrical Engineer in him that compels him to explain every nuance of the process. In reality, you need 2wires and a 21.5 volt dc power source. You’ll have to disconnect it and check voltage periodically. Don’t just go off and leave it. Charging a battery is still just charging a battery.

[@awsjumaili5301]

Great video Why my ryobi 18v charger reads “0” when I test with multimeter but it still charging

[@eolhcytoos]

Why are you checking a battery voltage without putting a load on it? The battery could have a very large internal impedance which would drop most of the voltage across it if a load was attached to the terminals.